fingerprint safe lock 1.Waterproof&dustproof 2.3 grades,99 users,297 ... and biometric waterproof biometric fingerprint lock, digital fingerprint lock, fingerprint safe lock Intelligent functionning: 1. 3 users grades: Administrator, User, Guest ... by date, by name or one by one.8.System protection: Initialized system with Administrator's fingerprint authorization, refresh the lock setting ...